Topological edge states in two-dimensional ${\mathbb{Z}}_4$ Potts paramagnet protected by the ${\mathbb{Z}}_4^{\times 3}$ symmetry

Hrant Topchyan, Tigran Hakobyan, Mkhitar Mirumyan +2

We construct a two-dimensional bosonic symmetry-protected topological (SPT) paramagnet protected by an on-site $G={\mathbb{Z}}_4^{\times 3}$ symmetry, starting from a three-component…